57156497 has 2 divisors, whose sum is σ = 57156498. Its totient is φ = 57156496.

The previous prime is 57156493. The next prime is 57156509. The reversal of 57156497 is 79465175.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 2972176 = 7361^2 + 1724^2 .

It is a cyclic number.

It is not a de Polignac number, because 57156497 - 2² = 57156493 is a prime.

It is a super-2 number, since 2×57156497² = 6533730298622018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (57156493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28578248 + 28578249.

It is an arithmetic number, because the mean of its divisors is an integer number (28578249).

Almost surely, 2^57156497 is an apocalyptic number.

It is an amenable number.

57156497 is a deficient number, since it is larger than the sum of its proper divisors (1).

57156497 is an equidigital number, since it uses as much as digits as its factorization.

57156497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 44.

The square root of 57156497 is about 7560.1915981012. The cubic root of 57156497 is about 385.2020011528.

The spelling of 57156497 in words is "fifty-seven million, one hundred fifty-six thousand, four hundred ninety-seven".